Improvement in gimlets



A STATES.

PATENT IMPROVEMENT IN GIMLETS.

Specification forming part of LettersPatent No. 133,440, dated November26,1872.

To all whom it may concern:

Be it known that I, CHARLES L. GRIswoLD, of Chester, in the county ofMiddlesex and State of Connecticut, have invented a new and valuableImprovement in Gimlets; and I do hereby declare that the following is afull, clear, and exact description of the construction and operation ofthe same, reference being had to the annexed drawing making a part oi'this speciiication, and to the letters and figures of reference markedthereon.

Figure 1 of the drawing is a representation of a vertical section of myinvention. Fig. 2 is a transverse section of my invention.

This invention has relation to gimlets and other boringtools; and itconsists in the novel construction of the handle, which is made in twosections secured together by a screw, and is provided withdiii'erentsized sockets for the reception of different-sized bits, allsubstantially as hereinafter more fully described.

Referring to the drawing, A Al designate the two equal sections ofthehandle, of which the section A is provided with a screw, c, t ting athreaded socket, c', formed in the secion A, and designed for thepurpose of securing the two sections together, yet allowing them to beseparated so that the bit may be attached. The bits B for said handlehaveV the ends of their shanks bent to form studs Z extending at a rightangle to said shank. In the inner end of the section A are formedseveral recesses, b, of various sizes, corresponding to the Shanks ofthe different kinds and sizes of bits, and designed to receive the studsZ. Channels or openings x extend from the mout-hs of said recesses tothe surface of the handle in radial order, and receive the shanks ofthebits in such a manner that the two sections of the handle may be screwedclosely and rigidly together, and the shaking of the bit prevented.

What I claim as my invention, and desire to secure by Letters Patent,is-

l. The combination of the section A having the L-shaped recesses b withthe section A', the screw a, and the bit having the stud Z,substantially as speciiied.

. 2. The sectional bit-handle A A having the graduated recesses b a',substantially as and for the purpose specified.

In testimony that I claim the above I have hereunto subscribed my namein the presence of two witnesses.

CHARLES L. GRISWOLD.

Witnesses:

ELI H. WILOOX, J osnrrr E. SILLIMAN.

